Flute T-shaped Tongue And Groove Cutter Sets Wood Cutting Tool (2pcs/set, Shank Diameter: 6.35mm)[MATERIAL]: Our cutters are made of solid hardened steel and C3 grit carbide. (Grade C3 carbide is the highest grade used in the router bit industry). Precise product design creates smooth, detailed cuts suitable for all levels of complexity. [PERFECT DESIGN]: Hardened steel body with anti-recoil design. Balancing tolerance of +/- 0.003 (allowing smooth operation at very high rpm). 3 C3 Carbide Tip - Micro-grain grade provides maximum strength and durability. [WIDE USE]: Router tools can cut most materials including: wood, MDF, particleboard, plywood, panel, softwood, hardwood, etc. end to end. Perfect choice of professionals and amateurs. [Where to use] Designed for laptop computers or desktop wood engraving machines, such as portable and table-mounted CNC routers. Note: It cannot be used in drills and electric drills. SIZE: Shank Diameter: 1/4 (6.35mm) Tooth Width: 1/4 (6.35mm) Tooth Depth: 1/2 (12.7mm) [Transition: 1cm=10mm = 0.39] SPECIFICATIONS: Material: Alloy Blade, Carbon Steel Handle Blade: Industrial Grade Micro-Grain Carbide Cutter: 600 Grit CNC Ground, Mirror Finish Balance: +/- 0.003 Tolerance Body: Fully Hardened Steel HOT REMINDER : 1. The blade is sharp enough to use it and keep it away from children. 2. Size for manual measurement, there may be 0-3mm error, belongs to the normal phenomenon. 3. Suitable for wood, MDF, particle board, compact plywood board; Avoid cutting ferrous metals and materials other than wood, such as: steel, iron, sand, etc.